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/**************************************************************************
*
* Copyright 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* Surface utility functions.
*
* @author Brian Paul
*/
#include "pipe/p_defines.h"
#include "pipe/p_screen.h"
#include "pipe/p_state.h"
#include "util/u_format.h"
#include "util/u_inlines.h"
#include "util/u_rect.h"
#include "util/u_surface.h"
/**
* Helper to quickly create an RGBA rendering surface of a certain size.
* \param textureOut returns the new texture
* \param surfaceOut returns the new surface
* \return TRUE for success, FALSE if failure
*/
boolean
util_create_rgba_surface(struct pipe_screen *screen,
uint width, uint height,
uint bind,
struct pipe_resource **textureOut,
struct pipe_surface **surfaceOut)
{
static const enum pipe_format rgbaFormats[] = {
PIPE_FORMAT_B8G8R8A8_UNORM,
PIPE_FORMAT_A8R8G8B8_UNORM,
PIPE_FORMAT_A8B8G8R8_UNORM,
PIPE_FORMAT_NONE
};
const uint target = PIPE_TEXTURE_2D;
enum pipe_format format = PIPE_FORMAT_NONE;
struct pipe_resource templ;
uint i;
/* Choose surface format */
for (i = 0; rgbaFormats[i]; i++) {
if (screen->is_format_supported(screen, rgbaFormats[i],
target, bind, 0)) {
format = rgbaFormats[i];
break;
}
}
if (format == PIPE_FORMAT_NONE)
return FALSE; /* unable to get an rgba format!?! */
/* create texture */
memset(&templ, 0, sizeof(templ));
templ.target = target;
templ.format = format;
templ.last_level = 0;
templ.width0 = width;
templ.height0 = height;
templ.depth0 = 1;
templ.bind = bind;
*textureOut = screen->resource_create(screen, &templ);
if (!*textureOut)
return FALSE;
/* create surface / view into texture */
*surfaceOut = screen->get_tex_surface(screen,
*textureOut,
0, 0, 0,
bind);
if (!*surfaceOut) {
pipe_resource_reference(textureOut, NULL);
return FALSE;
}
return TRUE;
}
/**
* Release the surface and texture from util_create_rgba_surface().
*/
void
util_destroy_rgba_surface(struct pipe_resource *texture,
struct pipe_surface *surface)
{
pipe_surface_reference(&surface, NULL);
pipe_resource_reference(&texture, NULL);
}
/**
* Fallback function for pipe->surface_copy().
* Note: (X,Y)=(0,0) is always the upper-left corner.
* if do_flip, flip the image vertically on its way from src rect to dst rect.
*/
void
util_surface_copy(struct pipe_context *pipe,
boolean do_flip,
struct pipe_surface *dst,
unsigned dst_x, unsigned dst_y,
struct pipe_surface *src,
unsigned src_x, unsigned src_y,
unsigned w, unsigned h)
{
struct pipe_transfer *src_trans, *dst_trans;
void *dst_map;
const void *src_map;
enum pipe_format src_format, dst_format;
assert(src->texture && dst->texture);
if (!src->texture || !dst->texture)
return;
src_format = src->texture->format;
dst_format = dst->texture->format;
src_trans = pipe_get_transfer(pipe,
src->texture,
src->face,
src->level,
src->zslice,
PIPE_TRANSFER_READ,
src_x, src_y, w, h);
dst_trans = pipe_get_transfer(pipe,
dst->texture,
dst->face,
dst->level,
dst->zslice,
PIPE_TRANSFER_WRITE,
dst_x, dst_y, w, h);
assert(util_format_get_blocksize(dst_format) == util_format_get_blocksize(src_format));
assert(util_format_get_blockwidth(dst_format) == util_format_get_blockwidth(src_format));
assert(util_format_get_blockheight(dst_format) == util_format_get_blockheight(src_format));
src_map = pipe->transfer_map(pipe, src_trans);
dst_map = pipe->transfer_map(pipe, dst_trans);
assert(src_map);
assert(dst_map);
if (src_map && dst_map) {
/* If do_flip, invert src_y position and pass negative src stride */
util_copy_rect(dst_map,
dst_format,
dst_trans->stride,
0, 0,
w, h,
src_map,
do_flip ? -(int) src_trans->stride : src_trans->stride,
0,
do_flip ? h - 1 : 0);
}
pipe->transfer_unmap(pipe, src_trans);
pipe->transfer_unmap(pipe, dst_trans);
pipe->transfer_destroy(pipe, src_trans);
pipe->transfer_destroy(pipe, dst_trans);
}
#define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
/**
* Fallback for pipe->surface_fill() function.
*/
void
util_surface_fill(struct pipe_context *pipe,
struct pipe_surface *dst,
unsigned dstx, unsigned dsty,
unsigned width, unsigned height, unsigned value)
{
struct pipe_transfer *dst_trans;
void *dst_map;
assert(dst->texture);
if (!dst->texture)
return;
dst_trans = pipe_get_transfer(pipe,
dst->texture,
dst->face,
dst->level,
dst->zslice,
PIPE_TRANSFER_WRITE,
dstx, dsty, width, height);
dst_map = pipe->transfer_map(pipe, dst_trans);
assert(dst_map);
if (dst_map) {
assert(dst_trans->stride > 0);
switch (util_format_get_blocksize(dst->texture->format)) {
case 1:
case 2:
case 4:
util_fill_rect(dst_map, dst->texture->format,
dst_trans->stride,
0, 0, width, height, value);
break;
case 8:
{
/* expand the 4-byte clear value to an 8-byte value */
ushort *row = (ushort *) dst_map;
ushort val0 = UBYTE_TO_USHORT((value >> 0) & 0xff);
ushort val1 = UBYTE_TO_USHORT((value >> 8) & 0xff);
ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
unsigned i, j;
val0 = (val0 << 8) | val0;
val1 = (val1 << 8) | val1;
val2 = (val2 << 8) | val2;
val3 = (val3 << 8) | val3;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
row[j*4+0] = val0;
row[j*4+1] = val1;
row[j*4+2] = val2;
row[j*4+3] = val3;
}
row += dst_trans->stride/2;
}
}
break;
default:
assert(0);
break;
}
}
pipe->transfer_unmap(pipe, dst_trans);
pipe->transfer_destroy(pipe, dst_trans);
}
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